MEASUREMENTS OF SUB-DEGREE B-MODE POLARIZATION IN THE COSMIC MICROWAVE BACKGROUND FROM 100 SQUARE DEGREES OF SPTPOL DATA

R. Keisler; S. Hoover; N. Harrington; J. W. Henning; P. A.R. Ade; K. A. Aird; J. E. Austermann; J. A. Beall; A. N. Bender; B. A. Benson; L. E. Bleem; J. E. Carlstrom; C. L. Chang; H. C. Chiang; H. M. Cho; R. Citron; T. M. Crawford; A. T. Crites; T. De Haan; M. A. Dobbs; W. Everett; J. Gallicchio; J. Gao; E. M. George; A. Gilbert; N. W. Halverson; D. Hanson; G. C. Hilton; G. P. Holder; W. L. Holzapfel; Z. Hou; J. D. Hrubes; N. Huang; J. Hubmayr; K. D. Irwin; L. Knox; A. T. Lee; E. M. Leitch; D. Li; D. Luong-Van; D. P. Marrone; J. J. McMahon; J. Mehl; S. S. Meyer; L. Mocanu; T. Natoli; J. P. Nibarger; V. Novosad; S. Padin; C. Pryke; C. L. Reichardt; J. E. Ruhl; B. R. Saliwanchik; J. T. Sayre; K. K. Schaffer; E. Shirokoff; G. Smecher; A. A. Stark; K. T. Story; C. Tucker; K. Vanderlinde; J. D. Vieira; G. Wang; N. Whitehorn; V. Yefremenko; O. Zahn

doi:10.1088/0004-637X/807/2/151

MEASUREMENTS OF SUB-DEGREE B-MODE POLARIZATION IN THE COSMIC MICROWAVE BACKGROUND FROM 100 SQUARE DEGREES OF SPTPOL DATA

R. Keisler, S. Hoover, N. Harrington, J. W. Henning, P. A.R. Ade, K. A. Aird, J. E. Austermann, J. A. Beall, A. N. Bender, B. A. Benson, L. E. Bleem, J. E. Carlstrom, C. L. Chang, H. C. Chiang, H. M. Cho, R. Citron, T. M. Crawford, A. T. Crites, T. De Haan, M. A. DobbsW. Everett, J. Gallicchio, J. Gao, E. M. George, A. Gilbert, N. W. Halverson, D. Hanson, G. C. Hilton, G. P. Holder, W. L. Holzapfel, Z. Hou, J. D. Hrubes, N. Huang, J. Hubmayr, K. D. Irwin, L. Knox, A. T. Lee, E. M. Leitch, D. Li, D. Luong-Van, D. P. Marrone, J. J. McMahon, J. Mehl, S. S. Meyer, L. Mocanu, T. Natoli, J. P. Nibarger, V. Novosad, S. Padin, C. Pryke, C. L. Reichardt, J. E. Ruhl, B. R. Saliwanchik, J. T. Sayre, K. K. Schaffer, E. Shirokoff, G. Smecher, A. A. Stark, K. T. Story, C. Tucker, K. Vanderlinde, J. D. Vieira, G. Wang, N. Whitehorn, V. Yefremenko, O. Zahn

Physics and Astronomy (Twin Cities)

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Abstract

We present a measurement of the B-mode polarization power spectrum (the BB spectrum) from 100 deg² of sky observed with SPTpol, a polarization-sensitive receiver currently installed on the South Pole Telescope. The observations used in this work were taken during 2012 and early 2013 and include data in spectral bands centered at 95 and 150 GHz. We report the BB spectrum in five bins in multipole space, spanning the range 300 ≤ l ≤ 2300, and for three spectral combinations: 95 GHz × 95 GHz, 95 GHz × 150 GHz, and 150 GHz × 150 GHz. We subtract small (<0.5σ in units of statistical uncertainty) biases from these spectra and account for the uncertainty in those biases. The resulting power spectra are inconsistent with zero power but consistent with predictions for the BB spectrum arising from the gravitational lensing of E-mode polarization. If we assume no other source of BB power besides lensed B modes, we determine a preference for lensed B modes of 4.9σ. After marginalizing over tensor power and foregrounds, namely, polarized emission from galactic dust and extragalactic sources, this significance is 4.3σ. Fitting for a single parameter, A_lens, that multiplies the predicted lensed B-mode spectrum, and marginalizing over tensor power and foregrounds, we find A_lens = 1.0.8 ± 0.26, indicating that our measured spectra are consistent with the signal expected from gravitational lensing. The data presented here provide the best measurement to date of the B-mode power spectrum on these angular scales.

Original language	English (US)
Article number	151
Journal	Astrophysical Journal
Volume	807
Issue number	2
DOIs	https://doi.org/10.1088/0004-637X/807/2/151
State	Published - Jul 10 2015

Bibliographical note

Publisher Copyright:
© 2015. The American Astronomical Society. All rights reserved.

Keywords

cosmic background radiation
cosmology: observations

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10.1088/0004-637X/807/2/151

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Keisler, R., Hoover, S., Harrington, N., Henning, J. W., Ade, P. A. R., Aird, K. A., Austermann, J. E., Beall, J. A., Bender, A. N., Benson, B. A., Bleem, L. E., Carlstrom, J. E., Chang, C. L., Chiang, H. C., Cho, H. M., Citron, R., Crawford, T. M., Crites, A. T., De Haan, T., ... Zahn, O. (2015). MEASUREMENTS OF SUB-DEGREE B-MODE POLARIZATION IN THE COSMIC MICROWAVE BACKGROUND FROM 100 SQUARE DEGREES OF SPTPOL DATA. Astrophysical Journal, 807(2), Article 151. https://doi.org/10.1088/0004-637X/807/2/151

Keisler, R, Hoover, S, Harrington, N, Henning, JW, Ade, PAR, Aird, KA, Austermann, JE, Beall, JA, Bender, AN, Benson, BA, Bleem, LE, Carlstrom, JE, Chang, CL, Chiang, HC, Cho, HM, Citron, R, Crawford, TM, Crites, AT, De Haan, T, Dobbs, MA, Everett, W, Gallicchio, J, Gao, J, George, EM, Gilbert, A, Halverson, NW, Hanson, D, Hilton, GC, Holder, GP, Holzapfel, WL, Hou, Z, Hrubes, JD, Huang, N, Hubmayr, J, Irwin, KD, Knox, L, Lee, AT, Leitch, EM, Li, D, Luong-Van, D, Marrone, DP, McMahon, JJ, Mehl, J, Meyer, SS, Mocanu, L, Natoli, T, Nibarger, JP, Novosad, V, Padin, S, Pryke, C, Reichardt, CL, Ruhl, JE, Saliwanchik, BR, Sayre, JT, Schaffer, KK, Shirokoff, E, Smecher, G, Stark, AA, Story, KT, Tucker, C, Vanderlinde, K, Vieira, JD, Wang, G, Whitehorn, N, Yefremenko, V & Zahn, O 2015, 'MEASUREMENTS OF SUB-DEGREE B-MODE POLARIZATION IN THE COSMIC MICROWAVE BACKGROUND FROM 100 SQUARE DEGREES OF SPTPOL DATA', Astrophysical Journal, vol. 807, no. 2, 151. https://doi.org/10.1088/0004-637X/807/2/151

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title = "MEASUREMENTS OF SUB-DEGREE B-MODE POLARIZATION IN THE COSMIC MICROWAVE BACKGROUND FROM 100 SQUARE DEGREES OF SPTPOL DATA",

abstract = "We present a measurement of the B-mode polarization power spectrum (the BB spectrum) from 100 deg2 of sky observed with SPTpol, a polarization-sensitive receiver currently installed on the South Pole Telescope. The observations used in this work were taken during 2012 and early 2013 and include data in spectral bands centered at 95 and 150 GHz. We report the BB spectrum in five bins in multipole space, spanning the range 300 ≤ l ≤ 2300, and for three spectral combinations: 95 GHz × 95 GHz, 95 GHz × 150 GHz, and 150 GHz × 150 GHz. We subtract small (<0.5σ in units of statistical uncertainty) biases from these spectra and account for the uncertainty in those biases. The resulting power spectra are inconsistent with zero power but consistent with predictions for the BB spectrum arising from the gravitational lensing of E-mode polarization. If we assume no other source of BB power besides lensed B modes, we determine a preference for lensed B modes of 4.9σ. After marginalizing over tensor power and foregrounds, namely, polarized emission from galactic dust and extragalactic sources, this significance is 4.3σ. Fitting for a single parameter, Alens, that multiplies the predicted lensed B-mode spectrum, and marginalizing over tensor power and foregrounds, we find Alens = 1.0.8 ± 0.26, indicating that our measured spectra are consistent with the signal expected from gravitational lensing. The data presented here provide the best measurement to date of the B-mode power spectrum on these angular scales.",

keywords = "cosmic background radiation, cosmology: observations",

author = "R. Keisler and S. Hoover and N. Harrington and Henning, {J. W.} and Ade, {P. A.R.} and Aird, {K. A.} and Austermann, {J. E.} and Beall, {J. A.} and Bender, {A. N.} and Benson, {B. A.} and Bleem, {L. E.} and Carlstrom, {J. E.} and Chang, {C. L.} and Chiang, {H. C.} and Cho, {H. M.} and R. Citron and Crawford, {T. M.} and Crites, {A. T.} and {De Haan}, T. and Dobbs, {M. A.} and W. Everett and J. Gallicchio and J. Gao and George, {E. M.} and A. Gilbert and Halverson, {N. W.} and D. Hanson and Hilton, {G. C.} and Holder, {G. P.} and Holzapfel, {W. L.} and Z. Hou and Hrubes, {J. D.} and N. Huang and J. Hubmayr and Irwin, {K. D.} and L. Knox and Lee, {A. T.} and Leitch, {E. M.} and D. Li and D. Luong-Van and Marrone, {D. P.} and McMahon, {J. J.} and J. Mehl and Meyer, {S. S.} and L. Mocanu and T. Natoli and Nibarger, {J. P.} and V. Novosad and S. Padin and C. Pryke and Reichardt, {C. L.} and Ruhl, {J. E.} and Saliwanchik, {B. R.} and Sayre, {J. T.} and Schaffer, {K. K.} and E. Shirokoff and G. Smecher and Stark, {A. A.} and Story, {K. T.} and C. Tucker and K. Vanderlinde and Vieira, {J. D.} and G. Wang and N. Whitehorn and V. Yefremenko and O. Zahn",

year = "2015",

month = jul,

day = "10",

doi = "10.1088/0004-637X/807/2/151",

language = "English (US)",

volume = "807",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing Ltd.",

number = "2",

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TY - JOUR

T1 - MEASUREMENTS OF SUB-DEGREE B-MODE POLARIZATION IN THE COSMIC MICROWAVE BACKGROUND FROM 100 SQUARE DEGREES OF SPTPOL DATA

AU - Keisler, R.

AU - Hoover, S.

AU - Harrington, N.

AU - Henning, J. W.

AU - Ade, P. A.R.

AU - Aird, K. A.

AU - Austermann, J. E.

AU - Beall, J. A.

AU - Bender, A. N.

AU - Benson, B. A.

AU - Bleem, L. E.

AU - Carlstrom, J. E.

AU - Chang, C. L.

AU - Chiang, H. C.

AU - Cho, H. M.

AU - Citron, R.

AU - Crawford, T. M.

AU - Crites, A. T.

AU - De Haan, T.

AU - Dobbs, M. A.

AU - Everett, W.

AU - Gallicchio, J.

AU - Gao, J.

AU - George, E. M.

AU - Gilbert, A.

AU - Halverson, N. W.

AU - Hanson, D.

AU - Hilton, G. C.

AU - Holder, G. P.

AU - Holzapfel, W. L.

AU - Hou, Z.

AU - Hrubes, J. D.

AU - Huang, N.

AU - Hubmayr, J.

AU - Irwin, K. D.

AU - Knox, L.

AU - Lee, A. T.

AU - Leitch, E. M.

AU - Li, D.

AU - Luong-Van, D.

AU - Marrone, D. P.

AU - McMahon, J. J.

AU - Mehl, J.

AU - Meyer, S. S.

AU - Mocanu, L.

AU - Natoli, T.

AU - Nibarger, J. P.

AU - Novosad, V.

AU - Padin, S.

AU - Pryke, C.

AU - Reichardt, C. L.

AU - Ruhl, J. E.

AU - Saliwanchik, B. R.

AU - Sayre, J. T.

AU - Schaffer, K. K.

AU - Shirokoff, E.

AU - Smecher, G.

AU - Stark, A. A.

AU - Story, K. T.

AU - Tucker, C.

AU - Vanderlinde, K.

AU - Vieira, J. D.

AU - Wang, G.

AU - Whitehorn, N.

AU - Yefremenko, V.

AU - Zahn, O.

PY - 2015/7/10

Y1 - 2015/7/10

N2 - We present a measurement of the B-mode polarization power spectrum (the BB spectrum) from 100 deg2 of sky observed with SPTpol, a polarization-sensitive receiver currently installed on the South Pole Telescope. The observations used in this work were taken during 2012 and early 2013 and include data in spectral bands centered at 95 and 150 GHz. We report the BB spectrum in five bins in multipole space, spanning the range 300 ≤ l ≤ 2300, and for three spectral combinations: 95 GHz × 95 GHz, 95 GHz × 150 GHz, and 150 GHz × 150 GHz. We subtract small (<0.5σ in units of statistical uncertainty) biases from these spectra and account for the uncertainty in those biases. The resulting power spectra are inconsistent with zero power but consistent with predictions for the BB spectrum arising from the gravitational lensing of E-mode polarization. If we assume no other source of BB power besides lensed B modes, we determine a preference for lensed B modes of 4.9σ. After marginalizing over tensor power and foregrounds, namely, polarized emission from galactic dust and extragalactic sources, this significance is 4.3σ. Fitting for a single parameter, Alens, that multiplies the predicted lensed B-mode spectrum, and marginalizing over tensor power and foregrounds, we find Alens = 1.0.8 ± 0.26, indicating that our measured spectra are consistent with the signal expected from gravitational lensing. The data presented here provide the best measurement to date of the B-mode power spectrum on these angular scales.

AB - We present a measurement of the B-mode polarization power spectrum (the BB spectrum) from 100 deg2 of sky observed with SPTpol, a polarization-sensitive receiver currently installed on the South Pole Telescope. The observations used in this work were taken during 2012 and early 2013 and include data in spectral bands centered at 95 and 150 GHz. We report the BB spectrum in five bins in multipole space, spanning the range 300 ≤ l ≤ 2300, and for three spectral combinations: 95 GHz × 95 GHz, 95 GHz × 150 GHz, and 150 GHz × 150 GHz. We subtract small (<0.5σ in units of statistical uncertainty) biases from these spectra and account for the uncertainty in those biases. The resulting power spectra are inconsistent with zero power but consistent with predictions for the BB spectrum arising from the gravitational lensing of E-mode polarization. If we assume no other source of BB power besides lensed B modes, we determine a preference for lensed B modes of 4.9σ. After marginalizing over tensor power and foregrounds, namely, polarized emission from galactic dust and extragalactic sources, this significance is 4.3σ. Fitting for a single parameter, Alens, that multiplies the predicted lensed B-mode spectrum, and marginalizing over tensor power and foregrounds, we find Alens = 1.0.8 ± 0.26, indicating that our measured spectra are consistent with the signal expected from gravitational lensing. The data presented here provide the best measurement to date of the B-mode power spectrum on these angular scales.

KW - cosmic background radiation

KW - cosmology: observations

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U2 - 10.1088/0004-637X/807/2/151

DO - 10.1088/0004-637X/807/2/151

M3 - Article

AN - SCOPUS:84937045920

SN - 0004-637X

VL - 807

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 151

ER -

MEASUREMENTS OF SUB-DEGREE B-MODE POLARIZATION IN THE COSMIC MICROWAVE BACKGROUND FROM 100 SQUARE DEGREES OF SPTPOL DATA

Abstract

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